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Currently, there is an out-of-bounds read on array hpetp->hp_dev
in the following for loop:
870 for (i = 0; i < hdp->hd_nirqs; i++)
871 hpetp->hp_dev[i].hd_hdwirq = hdp->hd_irq[i];
This is due to the recent change from one-element array to
flexible-array member in struct hpets:
104 struct hpets {
...
113 struct hpet_dev hp_dev[];
114 };
This change affected the total size of the dynamic memory
allocation, decreasing it by one time the size of struct hpet_dev.
Fix this by adjusting the allocation size when calling
struct_size().
Fixes: 987f028b8637c ("char: hpet: Use flexible-array member")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Eric Biggers <ebiggers@kernel.org>
Link: https://lore.kernel.org/r/20200129022613.GA24281@embeddedor.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
98c49f1746